feat(NODE-4687): Add logging to server selection

Author: aditi-khare-mongoDB

src/sdam/server_selection_events.ts

@@ -1,142 +0,0 @@
-import { HostAddress } from '.././utils';
-import {
-  SERVER_SELECTION_FAILED,
-  SERVER_SELECTION_STARTED,
-  SERVER_SELECTION_SUCCEEDED,
-  WAITING_FOR_SUITABLE_SERVER
-} from '../constants';
-import { type ReadPreference } from '../read_preference';
-import { type ServerSelector } from './server_selection';
-import type { TopologyDescription } from './topology_description';
-
-/**
- * The base export class for all logs published from server selection
- * @internal
- * @category Log Type
- */
-export abstract class ServerSelectionEvent {
-  /** String representation of the selector being used to select the server.
-   *  Defaults to 'custom selector' for application-provided custom selector case.
-   */
-  selector: string | ReadPreference | ServerSelector;
-  /** The name of the operation for which a server is being selected.  */
-  operation: string;
-  /** 	The current topology description.  */
-  topologyDescription: TopologyDescription;
-
-  /** @internal */
-  abstract name:
-    | typeof SERVER_SELECTION_STARTED
-    | typeof SERVER_SELECTION_SUCCEEDED
-    | typeof SERVER_SELECTION_FAILED
-    | typeof WAITING_FOR_SUITABLE_SERVER;
-
-  abstract message: string;
-
-  /** @internal */
-  constructor(
-    selector: string | ReadPreference | ServerSelector,
-    topologyDescription: TopologyDescription,
-    operation: string
-  ) {
-    this.selector = selector;
-    this.operation = operation;
-    this.topologyDescription = topologyDescription;
-  }
-}
-
-/**
- * An event published when server selection starts
- * @internal
- * @category Event
- */
-export class ServerSelectionStartedEvent extends ServerSelectionEvent {
-  /** @internal */
-  name = SERVER_SELECTION_STARTED;
-  message = 'Server selection started';
-
-  /** @internal */
-  constructor(
-    selector: string | ReadPreference | ServerSelector,
-    topologyDescription: TopologyDescription,
-    operation: string
-  ) {
-    super(selector, topologyDescription, operation);
-  }
-}
-
-/**
- * An event published when a server selection fails
- * @internal
- * @category Event
- */
-export class ServerSelectionFailedEvent extends ServerSelectionEvent {
-  /** @internal */
-  name = SERVER_SELECTION_FAILED;
-  message = 'Server selection failed';
-  /** Representation of the error the driver will throw regarding server selection failing. */
-  failure: Error;
-
-  /** @internal */
-  constructor(
-    selector: string | ReadPreference | ServerSelector,
-    topologyDescription: TopologyDescription,
-    error: Error,
-    operation: string
-  ) {
-    super(selector, topologyDescription, operation);
-    this.failure = error;
-  }
-}
-
-/**
- * An event published when server selection succeeds
- * @internal
- * @category Event
- */
-export class ServerSelectionSucceededEvent extends ServerSelectionEvent {
-  /** @internal */
-  name = SERVER_SELECTION_SUCCEEDED;
-  message = 'Server selection succeeded';
-  /** 	The hostname, IP address, or Unix domain socket path for the selected server. */
-  serverHost: string;
-  /** The port for the selected server. Optional; not present for Unix domain sockets. When the user does not specify a port and the default (27017) is used, the driver SHOULD include it here. */
-  serverPort: number | undefined;
-
-  /** @internal */
-  constructor(
-    selector: string | ReadPreference | ServerSelector,
-    topologyDescription: TopologyDescription,
-    address: string,
-    operation: string
-  ) {
-    super(selector, topologyDescription, operation);
-    const { host, port } = HostAddress.fromString(address).toHostPort();
-    this.serverHost = host;
-    this.serverPort = port;
-  }
-}
-
-/**
- * An event published when server selection is waiting for a suitable server to become available
- * @internal
- * @category Event
- */
-export class WaitingForSuitableServerEvent extends ServerSelectionEvent {
-  /** @internal */
-  name = WAITING_FOR_SUITABLE_SERVER;
-  message = 'Waiting for suitable server to become available';
-  /** The remaining time left until server selection will time out. */
-  remainingTimeMS: number;
-
-  /** @internal */
-  constructor(
-    selector: string | ReadPreference | ServerSelector,
-    topologyDescription: TopologyDescription,
-    remainingTimeMS: number,
-    operation: string
-  ) {
-    super(selector, topologyDescription, operation);
-    this.remainingTimeMS = remainingTimeMS;
-  }
-}